Title:
POLARIZED LIGHT SEPARATOR, METHOD OF MANUFACTURING THE SAME, AND PROJECTION DISPLAY
Document Type and Number:
WIPO Patent Application WO/1997/034173
Kind Code:
A1
Abstract:
A plate-like polarized light separator of a structure in which polarized light separating film surfaces and reflecting film surfaces are arranged alternately at fine pitches, and a projection display using such a polarized light separator. In the process for manufacturing such a polarized light separator, a glass block consisting of glass plates each having a polarized light separating multilayer film of an inorganic material, and glass plates each having a light reflecting surface are stuck alternately, is cut obliquely with respect to the stuck surfaces. At least one of the sides of the plate-like block thus cut off may be provided with a projecting used for the positioning of the polarized light separator. When a 'lambda'/2 phase plate is joined to a part of the light-outgoing surface of this polarized light separator, the polarized light separator which outputs either of s polarized component or p polarized component of light emitted from a light source is obtained. Such a polarized light separator can be utilized for a projection display.
Inventors:
HASHIZUME TOSHIAKI (JP)
ITOH YOSHITAKA (JP)
YAJIMA AKITAKA (JP)
ITOH YOSHITAKA (JP)
YAJIMA AKITAKA (JP)
Application Number:
PCT/JP1997/000790
Publication Date:
September 18, 1997
Filing Date:
March 12, 1997
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
HASHIZUME TOSHIAKI (JP)
ITOH YOSHITAKA (JP)
YAJIMA AKITAKA (JP)
HASHIZUME TOSHIAKI (JP)
ITOH YOSHITAKA (JP)
YAJIMA AKITAKA (JP)
International Classes:
G02B5/30; G02B5/04; G02B19/00; G02B27/18; G02B27/28; G02F1/13; G02F1/1335; G03B21/00; G03B21/14; G09F9/00; H04N5/74; H04N9/31; (IPC1-7): G02B5/30; G02B27/28; G02F1/13; G02F1/1335; G03B21/00
Domestic Patent References:
| WO1996020422A1 | 1996-07-04 |
Foreign References:
| JPH04310903A | 1992-11-02 | |||
| JPH07198944A | 1995-08-01 | |||
| JPH02167502A | 1990-06-27 | |||
| JPH0682623A | 1994-03-25 | |||
| JPH0572417A | 1993-03-26 | |||
| JPH04230705A | 1992-08-19 | |||
| JPS6190584A | 1986-05-08 | |||
| JPH04212104A | 1992-08-03 | |||
| JPH07225379A | 1995-08-22 |
Other References:
See also references of EP 0829739A4
Download PDF:
Previous Patent: MONITOR
Next Patent: HIGH-EFFICIENCY REFLECTIVE HOLOGRAPHIC DIFFUSER AND METHOD FOR MAKING THEREOF
Next Patent: HIGH-EFFICIENCY REFLECTIVE HOLOGRAPHIC DIFFUSER AND METHOD FOR MAKING THEREOF